How to Display Post Category

Hello (again…) ??

How to display post category under post title? Below are what I’ve did.
Is it correct?
I mean, yes it is display the post category. Just wanna make sure I did it correctly and not missed something wich I don’t know.

I added this to admin-config:

array (
'id'        => 'pp-category',
'type'      => 'checkbox',
'title'     => __('Display category for posts', 'zoner-lite'),
'default'   => true,
'class'	    => 'icheck',
'desc'      => __('Yes', 'zoner-lite'),
),

Then I added this to theme-function:

<?php if ($zoner_config['pp-category'] || !$zoner_is_redux_active) { ?>
<a class="link-icon" href="<?php get_category_link( $category_id ); ?>"><i class="fa fa-folder" aria-hidden="true"></i> <?php the_category(' '); ?> </a>
<?php } ?>

Thank you and regards.-